Blowtorch



March 13, 1928.

B. MARTIN \ulll Patented Mar. 13, 1928 UNITED- STATES eeann PATENT OFFICE.

BRUNO MARTIN, 0F SAGINAW, MICHIGAN.

BLOWTQRCH.

Application filed August 5, 1926. Serial No. 127,265.

This invention relates to certain new and useful improvements in blow torches or forges, and it has for its objects among others to provide an improved torch which shall produce the highest degree of heat, require less pumping, having provision for the maximum amount of air pressure, together with provision for preventing the dripping of the gasoline and its overflow onto the floor or over the side of the tank, thus obviating the danger of fire, protecting life and property, and at the same time the 9 oil from the drip cup will aid to generate the burner.

I provide a corrugated burner tube Wl11Cl1 serves to produce the greatest amount of heat, and I provide novel means for supporting the pump, utilizing the lateral sup port for the flow 01 air to the top of the tank, and disposing the air tube exteriorly of the tanl; and extending the same upward to the top of the tank.

I further provide means for holding the valve stem and piston'down after the air has been pumped into the top of thetank.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be specifically pointed out in the appended claims.

The invention, in its preferred form is clearly illustrated in the accompanying drawings, which, with the numerals of ref: erence marked thereon, form a partof this specification, and in which Figure 1 is a side elevation, with parts broken away and others in section, to bet ter show thevconstru'ction and arrangementof some of the parts;

Figure 2 is a view at right angles to Figure 1.

Like numerals of reference indicate like parts in the difl'erent views.

Referring to the drawings p 1 designates the tank, which is of tapered form as shown in order to provide the greatest amount of air pressure in a manner which will be readily understood, which, in turn, reduces the amount of pumping required.

2 is the top of the tank. Its upper surface is concaved as seen at 3 to form a receptacle for the gasoline and to prevent the dripping of the latter and overflowing onto the side of the tank and floor, and in this way it eliminates the danger of fire as will be readily understood.

SecLi1etl in and rising from the top 2 is a pipe 4 threaded into the top, or otherwise ailixed therein, the upper end of the said pipe be.ingscrew threaded as seen at 5 and having a collar 6 thereon, and betweenvthis collar and a collar 7 onthe pipe near'its junctionwith the top is a drip cup 8, held 1n proper position by any suitable means, as the screw 9. This drip cup may be of i any well known or approved form, suited to the purpose.

10 is the wick, of extending down within the tank and its upper end extended through the screw threadany suitable character,

ed upper end of the pipe 4 and entering the a nipple 11. depending "from the casting 12,

the latter being screw threaded to engage i opening 14: controlled by the needle valve or point15 the latter being regulated by the handle 16 on the valve stem 17 as seen in Figure 1.

i The member 13 extends beyond the end of the casting 12 as shown and receives the internally threaded end of the burner tube 18, which latter is fluted or corrugated upon its exterior as seen at 19 its outer end being open as usual and the tube: being provided with a multiplicity of lateral openings 20, as seenin Figure 1, the perforations extended from between the walls of the corrugations. i In assembling these'parts, the pipeis affixed in position in the top of the tank, the

drip cup is placed in position and secured where desired by its screw, the Wick having been previously placed imposition, or this may be done after the pipe is placed in position and then the casting and the burner tube are placed in position. a

On the burner tube is a soldering iron support 21.

It is tobe noted that the member 13 may be integral with the castinglQ, or a separate piece carried thereby. I

22 is a lateral member from the tank near its upper end, and on this and communicating therewith is a filling cup 23, provided with a cap 24, 25 being a valve fitted to a seat 26 at the bottom of said cup, as seen inFigure 1, the valve being carried by a stem 27 provided with a suitable handle 28, as seen in Figures 1 and 2. This member 22 has a passage 29 communicating with the interioriof near the top latter as seen in Figure 1.

I The lateral member 22 is extended to form a support for the upper endof the pump cylinder 30, which is provided with a rubber or analogous cover 31, Figure The lower end of the pump cylinder is supported by thelower lateral tubular memhe,r,,32 ,which communicates with the cylinder of the pump as seen inFigure 1 and shown clearly in with the vertical pipe 33 which latter is disposed outside of and along the wall of the tank as seen in Figure 1.

:Withinthe pumpcylinder is a piston34 carried by the stem 35;.provided with a fisuitable' handle 36b which it may be reciprocated for the purpose of pumping airs to the top of the tank.

,111 order to hold the valve stem down I providethe latter with a lateralmember 37 with which is designed to engage a pivoted member, or the equivalent, 38, hinged as at 39, tothe member 40 secured to the lateral member 22, as shown clearly in Figure 1.

y V (In use, thetapered tank provides for a maximum amount-otair pressure and less I pumping is required, while the corrugated burner tube anddrip eupproduce the greatest amount of heatmBy reason ofthe tapers of the tank'thel device as a whole rests most securely upon any support and is not liable to be tipped over. The disposition of the supply tube 33 outside the tank instead of within the same cconomizes construction,

" saves incost and strengthens thetank,

The torch may be made of copper, aluminum, or any othen material suited to the pu pose. r a a i The-pipe33 maybe caused to communicate withthe passage 29in the lateral memher 22 and through it into the tank, or communicate directly with the. interior of the tanlethrough an :opening in the wall of the latter. a: a

I ;.Thej construction and mode of useis so apparent thata detailed description of the latter'is not, deemed necessary. Modifications indetail may be resorted to without departing from the spirit of the in- ,vention or sacrificing any of its advantages.

As seen in Figure 1 the minuteopening 14 may :be formed in a separate member 41 made in theform of a threaded plug which cone shaped as seen at 42 in Figure 1; by

this means the stream of flame coming out of the smaller hole will be more concentrated and, 'lorur a greater melting flame.

\Vhatisiclaimed as'new is a y 1. In a blow torch, atapered tank, lateral hollow supports thereon, an air pump on and I in communication with said supports, and a pipe lying against arul secured to the outer wall ofthe said tank and closely contacting therewith and conm'mnicating withone of the said lateral supports and with the tank. 2. In a; blow torch,a tank, an air pump supported thereby and entirely exterior thereof and conummicating therewith, a pipe connecting said hollow lateral members and connecting them with said tank, said pipe secured in close contact with the wall otthe tank, and comnnmicating with one of the hollow members, and interengaging means on the stem of the pump piston and the support of the pump for holding the piston in its lowered position.

3, In a blow torch, a tank, a pump, a hollow lateral member connected with the latter at the lower end, a lateral member at the upper end of the pump, and a tubular L member rigid with the tank and closely contacting therewith, said supporting member beingin eommunication with the pump, said tubular member being also rigid with the lateral members and in communication with the tank, 7 a y y i 4. In" a blow torch, a tank, a pump, a lateral hollow member connected with the latter at the lowerend, a lateral member at the upper end of the pump, a tubular mem' her rigid, with said lateral members and in communication with the pump, said tubular member closely contacting with the outer wall of the tank, said tubular member being also in conununication with the tank, and a filling cup'mounted on the upper lateral member and emptying laterally into the tank. V i a I Intestimony whereof I aflix my signature.

I BRUNC) MARTIN.

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